The Pion Electromagnetic Form-factor in the Timelike Energy Range 1.35-{GeV} $\le \sqrt{s} \le$ 2.4-{GeV}

The DM2 collaboration Bisello, D. ; Busetto, G. ; Castro, A. ; et al.
Phys.Lett.B 220 (1989) 321-327, 1989.
Inspire Record 267118 DOI 10.17182/hepdata.29829

The e + e − → π + π − cross section has been measured from about 280 events (an order of magnitude more than the previous world statistics) in the energy interval 1.35 ⩽ s ⩽ 2.4 GeV with the DM2 detector at DCI. The pion squared form factor | F π | 2 shows a deep minimum around 1.6 GeV/ c 2 and is better fit under the hypothesis of two ϱ-like resonance ⋍0.25 GeV/ c 2 wide with 1.42 and 1.77 GeV/ c 2 masses.

1 data table match query

Statistical errors only.


Pion Form-Factor Measurement by e+ e- --> pi+ pi- in the Energy Range 2 e from 0.78-GeV Up to 1.34-GeV

Bukin, A.D. ; Vasserman, I.B. ; Koop, I.A. ; et al.
Phys.Lett.B 73 (1978) 226-228, 1978.
Inspire Record 134220 DOI 10.17182/hepdata.27474

The cross section of the reaction e + e − → π + π − has been measured in the energy range 2 E from 0.78 up to 1.34 GeV. The obtained experimental values of the pion form factor exceed notably the ρ -meson tail.

1 data table match query

No description provided.


The time-like electromagnetic form factors of the charged pseudoscalar mesons from 1.44-GeV**2 to 9.0-GeV**2.

Bernardini, M. ; Bollini, D. ; Brunini, P.L. ; et al.
Phys.Lett.B 46 (1973) 261-264, 1973.
Inspire Record 85277 DOI 10.17182/hepdata.28063

The study of 620 hadron pairs produced in the s -range (1.44−9.0) GeV 2 , has yielded 110 collinear hadronic events. Their identification in terms of π and K mesons allows the determination of the time-like electromagnetic from factors of these pseudoscalar mesons in the above time-like range. The total number of (e + e − ) events observed in the same experimental conditions is 18 048.

1 data table match query

No description provided.


Measurement of the electron-positron annihilation cross-section into pi+ pi-, k+ k- pairs at the total energy 1.18-1.34 gev

Balakin, V.E. ; Budker, G.I. ; Kurdadze, L.M. ; et al.
Phys.Lett.B 41 (1972) 205-208, 1972.
Inspire Record 75634 DOI 10.17182/hepdata.28229

Using the electron-position storage ring VEPP-2 an experiment has been performed in which the cross-sections of the reactions e + e − → π + π − and e + e − →K + K − were measured in the energy regi on 1.18–1.34 GeV. The experimental values of the formfactors lie higher than curves extrapolated from the ϱ- and ϕ-meson region.

2 data tables match query

No description provided.

No description provided.


The Pion Electromagnetic Form-Factor in the Timelike Range 1.44-GeV**2-9.0-GeV**2

Bollini, D. ; Giusti, P. ; Massam, T. ; et al.
Lett.Nuovo Cim. 14 (1975) 418, 1975.
Inspire Record 100180 DOI 10.17182/hepdata.37445

None

1 data table match query

No description provided.